Reactor nuclear instrumentation system, reactor power distribution monitor system including above instrumentation system and reactor power distribution monitoring method

摘要

A reactor nuclear instrumentation system comprises: a plurality of incore nuclear instrumentation assemblies arranged in a gap between a number of fuel assemblies charged in a reactor core, the incore nuclear instrumentation assemblies each including a fixed type neutron detector assembly comprising a plurality of fixed type neutron detectors dispersively arranged in a core axial direction and a fixed type gamma thermometer assembly comprising a plurality of fixed type gamma-ray heat detectors arranged at least in a same core axial direction as the fixed type neutron detectors; a power range detector signal processing device operatively connected to the fixed type neutron detector assemblies through signal cables; and a gamma thermometer signal processing device operatively connected to the fixed type gamma thermometer assembly of the incore nuclear instrumentation assembly through a signal cable.